Probably because old calendars (such as the Persian Calendar) used 360 days for a year-when they watched the stars they saw them revolve around the North Star one degree per day.
September 27, 2015 will bring a supermoon lunar eclipse at nightfall. The last lunar eclipse of this magnitude occurred in 1982, and the next one of a similar magnitude will be in 2033. A lesser lunar eclipse will come in 2018. The lunar eclipse part of this phenomenon, according CTV, is caused by the Earth inserting itself between the sun and the moon. As this happens, the Earth casts its shadow on the face of the moon.
Home Sun & Moon Eclipses August 18, 2016 â Almost Lunar Eclipse. timeanddate.com calculations show that the Sun, Earth, and Moon will be very closely aligned on this day, but there will be no lunar eclipse. There are several different ways to calculate eclipses, so some sources are listing this event as a penumbral lunar eclipse.